| 摘要 |
<p>The invention provides an optical disk including an image recording layer and a first cover layer formed in this order on one surface side of a substrate, and an information recording layer and a second cover layer formed in this order on the other surface side of the substrate. The thicknesses of the first cover layer and the second cover layer are preferably substantially the same as each other. The materials of the first cover layer and the second cover layer are preferably the same material. The materials of the first cover layer and the second cover layer are preferably cellulose triacetate.</p> |
